.btn{padding:10px 20px;font-size:16px;border-radius:5px;border:none;cursor:pointer;transition:background-color .3s ease}.btn-primary{background-color:#204185;color:#fff}.btn-primary:hover{background-color:#0b2d71}.btn-secondary{background-color:#6c757d;color:#fff}.btn-secondary:hover{background-color:#5a6268}.btn-danger{background-color:#dc3545;color:#fff}.btn-danger:hover{background-color:#c82333}